The Typo Eradication Advancement League is on a mission.  To correct typos.  As they explain:

This March through May, we, sworn members of TEAL, will be taking a road trip around the country to stamp out as many typos as we can find, in public signage and other venues where innocent eyes may be befouled by vile stains on the delicate fabric of our language. We do not blame, nor chastise, the authors of these typos. It is natural for mistakes to occur; everybody will slip now and again. But slowly the once-unassailable foundations of spelling are crumbling, and the time has come for the crisis to be addressed. We believe that only through working together with vigilance and a love of correctness can we achieve the beauty of a typo-free society.

Recently, they visited Manchester, NH, and found an unusual amount of typos.  From their blog, here are some photos: